Saved on this device

Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

History

The Development of Double-Entry Bookkeeping in Renaissance Italy

Quick fact

The first printed book on double-entry bookkeeping was written by the mathematician Luca Pacioli, a friend of Leonardo da Vinci, and was part of a larger mathematics textbook published in 1494.

Why this is interesting

Have you ever wondered how a merchant in 1400s Venice could possibly keep track of thousands of transactions without a computer? The answer lies in a clever bookkeeping system that made the numbers always add up—and it's still used by every business today.